"hate something bad"?

When I was netsurfing the other day I came across this sentence.

"I hate him so bad, and don't want to talk to him any more."

First, does this sentence sound correct? I wasn't quite sure about the usage of the word "bad" as an adverb... modifying the verb "hate." And next, which of the following sound natural/unnatural to you?

1. I hate it so bad.
2. I hate it very bad.
3. I hate it very much.
4. I hate it so much.
5. I hate it so badly.
6. I hate it very badly.

Hi,

The number four (4) is correct for me, because it sounds well

"I hate him so bad" isn't grammatically correct, but it's common to hear such a phrase in certain AmE vernaculars.

3 and 4 sound the most natural to me, with 4 being my top choice.

The only ones I'd ever use are these.

3. I hate it very much.
4. I hate it so much.

I'd usually choose 4 because it seems to have more feeling. The other's are commonly used but sound quite uneducated to me.

Thanks guys for your replies. As an ESL student I think I should intentionally use the grammatically correct ones... which would be 3 or 4:D